/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraParameterDefinitionsSubscriber.h
[UNiagaraParameterDefinitionsBase](API\Plugins\Niagara\UNiagaraParameterDefinitionsBase) * FindSubscribedParameterDefinitionsById ( const [FGuid](API\Runtime\Core\Misc\FGuid) & DefinitionsId ) const